Battery sealing cover and manufacturing method and equipment of battery sealing cover

Abstract

The invention provides a battery sealing cover and a manufacturing method and equipment of the battery sealing cover, the battery sealing cover comprises a reinforcing edge and a laminated board which are integrally formed, the reinforcing edge is arranged around the edge of the laminated board, the thickness of the reinforcing edge is greater than that of the laminated board, and the laminated board and the reinforcing board are made of the same material. Comprising continuous reinforced fibers and an infiltration material wrapping the continuous reinforced fibers. According to the present invention, the continuous reinforcing fiber has low density and high strength, such that the light weight and the high strength of the battery sealing cover can be achieved, and the continuous reinforcing fiber has low density and high strength, such that the light weight and the high strength of the battery sealing cover can be achieved. The reinforcing edge and the laminated board of the battery sealing cover formed by compounding the composite material are integrally formed, so that the reinforcing edge and the laminated board cannot be separated in a long-term use process, and the overall firmness of the battery sealing cover can be ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of composite materials, and in particular to a battery sealing cover, and a manufacturing method and equipment for the battery sealing cover. Background Art

[0002] New energy vehicles are an industry that is being vigorously promoted in China. Currently, most of the battery sealing covers of new energy vehicles are made of SMC materials, which are usually relatively heavy, thus affecting the lightweight of new energy vehicles. In addition, the batteries of new energy vehicles are prone to high temperatures and overheating during operation, while the high temperature resistance of SMC materials is poor, and the battery sealing covers are prone to deformation and damage during long-term use. In addition, in order to improve the mechanical properties of the battery sealing cover, a number of ribs are usually set on the battery sealing cover in an adhesive manner. This connection method is not only unstable, but also increases the overall weight of the battery sealing cover. Summary of the invention

[0003] The following is a summary of the subject matter of the detailed description of the present disclosure. This summary is not intended to limit the scope of the claims.

[0004] The present disclosure provides a method for manufacturing a battery sealing cover, the manufacturing method comprising:

[0005] Infiltrating continuous reinforcing fibers with molten prepreg materials to obtain laminates and reinforced plates;

[0006] Cutting the reinforcement plate to obtain a reinforcement edge;

[0007] The reinforcing edge and the laminate are sequentially fed into a mold, and the reinforcing edge and the laminate are heated to soften the reinforcing edge and the laminate and integrally form the composite plate;

[0008] After the reinforcing edge and the laminate have softened for a preset period of time, closing the mold and applying a preset pressure to the composite sheet;

[0009] Opening the mold to obtain the battery sealing cover;

[0010] Wherein, the reinforcing edge is arranged around the edge of the laminate, and the thickness of the reinforcing edge is greater than the thickness of the laminate.

[0011] In some embodiments of the present disclosure, the prepreg material comprises the following components by mass percentage:

[0012] Resin 50%-60%;

[0013] Flame retardant 20%-30%;

[0014] Toughener 15%-25%.

[0015] In some embodiments of the present disclosure, the preset time length is 10s-20s, and the preset pressure is 700t-800t.

[0016] In some embodiments of the present disclosure, the mold includes a heating system, and the heating of the reinforcing edge and the laminate includes:

[0017] The mold and the composite plate are heated to 80°C-100°C by using an infrared heating device; or,

[0018] The mold and the composite plate are heated by the heating system with a heating temperature of 170°C-190°C.

[0019] In some embodiments of the present disclosure, when the mold and the composite plate are heated by an infrared heating device, the duration of applying the preset pressure to the composite plate is 60s-90s;

[0020] When the heating system is used to heat the mold and the composite plate, the duration of applying the preset pressure to the composite plate is 20 minutes to 30 minutes.

[0021] In some embodiments of the present disclosure, the mold further includes a cooling system. After the mold and the composite sheet are heated by the heating system, when pressure is applied to the composite sheet, the method for manufacturing the battery sealing cover further includes:

[0022] The mold and the composite plate are cooled to 60°C-80°C by using a cooling system.

[0023] A second aspect of the present disclosure provides an apparatus for making a battery sealing cover, comprising:

[0024] A compounding machine, used to impregnate the continuous reinforcing fibers with the prepreg material in a molten state to obtain a laminate and a reinforced plate;

[0025] A cutting device, used for cutting the reinforcing plate to obtain a reinforcing edge;

[0026] The mold comprises an upper mold and a lower mold, and the mold and the lower mold are molded together to form a cavity for placing the laminate and the reinforcing edge;

[0027] A heating device, used for heating the reinforcing edge and the laminate in the mold, so that the reinforcing edge and the laminate are softened and integrally formed into a composite plate;

[0028] A driving device is used to realize the closing and opening of the upper mold and the lower mold.

[0029] In some embodiments of the present disclosure, the compound machine includes a heating structure, a cooling structure and a conveying structure, and the cooling structure and the heating structure are sequentially distributed along a conveying direction of the conveying structure.

[0030] In some embodiments of the present disclosure, the heating device includes an infrared heating device, and the device also includes a slide rail; the mold and the infrared heating device are arranged on the slide rail, and the infrared heating device is used to slide along the slide rail to a specified position to heat the mold and the composite plate; or,

[0031] The mold comprises a heating system and a cooling system, wherein the heating system is used to heat the mold and the composite plate, and the cooling system is used to cool the mold and the composite plate.

[0032] A third aspect of the present disclosure provides a battery sealing cover, the battery sealing cover comprising an integrally formed reinforcing edge and a laminate, the reinforcing edge being arranged around an edge of the laminate, the thickness of the reinforcing edge being greater than the thickness of the laminate;

[0033] The laminate and the reinforced plate are made of the same material, including continuous reinforcing fibers and a saturated material covering the continuous reinforcing fibers.

[0034] The battery sealing cover, the manufacturing method and the equipment of the battery sealing cover provided by the embodiments of the present disclosure have the following beneficial effects: the continuous reinforcing fiber has a lower density and a higher strength, so the battery sealing cover can be lightweight and have a high strength. In addition, the reinforcing edge and the laminate of the battery sealing cover formed by the composite material mold are integrally formed. During long-term use, the reinforcing edge and the laminate will not separate, which can ensure the overall firmness of the battery sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the present disclosure and are used together with the description to explain the principles of the embodiments of the present disclosure. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present disclosure, rather than all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A flow chart of a method for manufacturing a battery sealing cover according to an exemplary embodiment of the present disclosure;

[0037] Figure 2 The present invention is a structural diagram of an apparatus for manufacturing a battery sealing cover according to an exemplary embodiment of the present invention.

[0038] Figure 3A structural diagram of a slide rail, a heating device and a mold of an apparatus for making a battery sealing cover according to an exemplary embodiment of the present disclosure.

[0039] Figure 4 A structural diagram of a protective housing of an apparatus for manufacturing a battery sealing cover according to an exemplary embodiment of the present disclosure.

[0040] Figure 5 A structural diagram of a mold of an apparatus for manufacturing a battery sealing cover according to an exemplary embodiment of the present disclosure.

[0041] Figure 6 The present invention is a structural diagram of a battery sealing cover according to an exemplary embodiment of the present invention.

[0042] In the figure:

[0043] 1. Compound machine; 101. Heating structure; 102. Cooling structure; 103. Conveying structure; 2. Cutting device; 3. Heating device; 301. Infrared heating device; 4. Driving device; 5. Mould; 501. Upper mould; 502. Lower mould; 6. Laminate; 7. Reinforced edge; 8. Slide rail; 9. Heating system; 901. Heating oil pipe; 10. Cooling system; 1001. Cooling water pipe; 11. Protective casing. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the disclosed embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other without conflict.

[0045] New energy vehicles are an industry that is being vigorously promoted in China. Currently, most of the battery sealing covers of new energy vehicles are made of SMC materials, which are usually relatively heavy, thus affecting the lightweight of new energy vehicles. In addition, the batteries of new energy vehicles are prone to high temperatures and overheating during operation, while the high temperature resistance of SMC materials is poor, and the battery sealing covers are prone to deformation and damage during long-term use. In addition, in order to improve the mechanical properties of the battery sealing cover, a number of ribs are usually set on the battery sealing cover in an adhesive manner. This connection method is not only unstable, but also increases the overall weight of the battery sealing cover.

[0046] In order to solve the above technical problems, a battery sealing cover, a method for manufacturing a battery sealing cover and an apparatus are provided in an exemplary embodiment of the present disclosure. The continuous reinforced fiber has a lower density and a higher strength, so the battery sealing cover can be lightweight and have a high strength. In addition, the reinforcing edge and the laminate of the battery sealing cover formed by the composite material mold are integrally formed. During long-term use, the reinforcing edge and the laminate will not separate, thereby ensuring the overall firmness of the battery sealing cover.

[0047] The battery sealing cover, the manufacturing method and the equipment of the battery sealing cover provided by the present invention are described in detail below in conjunction with the accompanying drawings.

[0048] An exemplary embodiment of the present disclosure provides a method for manufacturing a battery sealing cover, such as Figure 1 As shown, the production method includes:

[0049] Step S100: impregnating continuous reinforcing fibers with molten prepreg material to obtain a laminate and a reinforcement plate.

[0050] Exemplarily, the continuous fibers may include long fibers or medium-long fibers, and specifically may include boron fibers, glass fibers, carbon fibers, silicon carbide fibers, aramid fibers, ultra-high-strength polyethylene fibers, and the like.

[0051] Prepreg materials include the following components by mass percentage:

[0052] Resin 50%-60%;

[0053] Flame retardant 20%-30%;

[0054] Toughener 15%-25%.

[0055] Among them, the resin may include polypropylene, polyethylene, nylon, etc. The flame retardant can, for example, form a carbonized layer through combustion to block the entry of heat and oxygen through the carbonized layer to ensure the flame retardancy of the battery sealing cover. The role of the toughening agent is to induce a large number of shear bands in the resin, which can be dissipated through the formation of silver streaks when subjected to external forces, thereby improving the impact resistance of the polycarbonate material.

[0056] Exemplarily, the flame retardant may include one or more of polyaryl phosphate (PAP), polytetrafluoroethylene (PTFE), and triphenyl phosphate (TPP), and the toughening agent may include one or more of ethylene-methyl acetate copolymer (EMA), ethylene-acetate copolymer (EEA), and ethylene-vinyl acetate copolymer (EVA).

[0057] Exemplarily, the continuous reinforcing fibers adopt a ply structure of [0° / 90° / 0° / 90° / 0°], and the ply thickness is 1.5 mm.

[0058] Step S200: cutting the reinforcing plate to obtain a reinforcing edge.

[0059] Among them, Figure 6 As shown, the size of the outer contour of the reinforcing edge 7 is greater than or equal to the size of the outer contour of the laminate 6.

[0060] Exemplarily, the cutting device 2 may be used to cut the reinforcing plate, and the shape of the reinforcing edge 7 formed by cutting may be a rectangular frame, but is not limited thereto.

[0061] Step S300: feeding the reinforcing edge and the laminate into the mold in sequence, heating the reinforcing edge and the laminate, softening the reinforcing edge and the laminate, and integrally forming the composite board.

[0062] For example, the following can be used: Figure 3 and Figure 4 The infrared heating device 301 shown heats the mold 5 and the composite board to 80°C-100°C, wherein the infrared heating device 301 can directly transfer heat to the surface of the laminate 6 and the reinforcing edge 7 by electromagnetic radiation. During the heat conduction process, the heat loss is small, so the laminate 6 and the reinforcing edge 7 can be quickly softened by heat, and the softened reinforcing edge 7 and the laminate 6 can be integrally formed into a composite board.

[0063] Alternatively, the mold 5 itself includes a heating system 9, which can be used to achieve the purpose of heating the composite board. The heating temperature of the heating system 9 can be 170°C-190°C. Setting the heating temperature higher can avoid excessive heat loss during heat conduction, resulting in the temperature applied to the reinforcing edge 7 and the laminate 6 being too low, and the reinforcing edge 7 and the laminate 6 being unable to soften, thereby ensuring the softening efficiency of the laminate 6 and the reinforcing edge 7.

[0064] Step S400: After the reinforced edge and the laminate are softened for a preset period of time, the mold is closed and a preset pressure is applied to the composite board.

[0065] Exemplarily, the preset time is 10s-20s. Setting the preset time shorter can improve the production efficiency of the composite material on the one hand, and avoid the problem of surface hardening caused by the edge and the laminate 6 being exposed to the external environment for a long time on the other hand.

[0066] The preset pressure is 700t-800t, wherein, in the process of heating the composite plate by the infrared heating device 301, Figure 5 The duration of applying the preset pressure to the composite board is 60s-90s. When the composite board is heated by the heating system 9 of the mold 5 itself, the duration of applying the preset pressure to the composite board by the mold 5 is 20min-30min.

[0067] Step S500: Open the mold to obtain a battery sealing cover.

[0068] The thickness of the reinforcing edge 7 is greater than the thickness of the laminate 6. Figure 5 As shown, the mold 5 is composed of an upper mold 501 and a lower mold 502 , and the shape of the battery sealing cover is determined by the shape of the cavity between the upper mold 501 and the lower mold 502 .

[0069] The battery sealing cover prepared by the method disclosed in the present invention was tested for performance in accordance with the national standard GB / T31467.3-2015 "Lithium-ion power battery pack system for electric vehicles Part 3: Safety requirements and test methods". A battery sealing cover made of SMS material (comparative example) was used as a control. The test results are shown in Table 1 below.

[0070]

[0071]

[0072] Table 1

[0073] Referring to Table 1, in this embodiment, the continuous reinforced fiber has a lower density and a higher strength, so the battery sealing cover can be lightweight and have a high strength. In addition, the reinforcing edge 7 and the laminate 6 of the battery sealing cover formed by the composite material mold are integrally formed. During long-term use, the reinforcing edge 7 and the laminate 6 will not separate, thereby ensuring the overall firmness of the battery sealing cover.

[0074] In some embodiments, the mold 5 further includes a cooling system 10, which is used to cool the mold 5 and the composite sheet to 60°C-80°C when applying pressure to the composite sheet after the mold 5 and the composite sheet are heated by the heating system 9. In this temperature range, the battery sealing cover formed by the composite sheet mold is basically finalized, so the mold can be opened. Waiting until the composite sheet is cooled to this temperature range before opening the mold can avoid the problem of deformation of the battery sealing cover caused by premature mold opening, thereby ensuring the yield of the battery sealing cover.

[0075] Another exemplary embodiment of the present disclosure provides an apparatus for making a battery sealing cover, such as Figure 2 As shown, the device includes a compounding machine 1, a cutting device 2, a heating device 3 and a driving device 4. The compounding machine 1 is used to make the prepreg material in a molten state impregnate the continuous reinforcing fibers to obtain a laminate 6 and a reinforcing plate. The cutting device 2 is used to cut the reinforcing plate to obtain a reinforcing edge 7. The heating device 3 is used to heat the reinforcing edge 7 and the laminate 6 in the mold 5, so that the reinforcing edge 7 and the laminate 6 are softened and integrally formed into a composite plate.

[0076] Continue to refer Figure 3 The mold 5 includes an upper mold 501 and a lower mold 502. The mold 5 and the lower mold 502 are molded together to form a cavity for placing the laminate 6 and the reinforcing edge 7. The driving device 4 is used to realize the mold closing and opening of the upper mold 501 and the lower mold 502.

[0077] For example, the prepreg material may be impregnated on the surface of the continuous reinforcing fibers before the continuous reinforcing fibers are conveyed using the compounding machine 1 , or the prepreg material may be impregnated on the surface of the continuous reinforcing fibers during the conveying of the continuous reinforcing fibers.

[0078] Among them, continue to refer to Figure 3 The driving device 4 can be connected to the upper mold 501 or the lower mold 502, and apply a preset pressure to the composite sheet in the cavity by driving the upper mold 501 or the lower mold 502. Alternatively, the driving device 4 can be connected to the upper mold 501 and the lower mold 502 at the same time, and drive the upper mold 501 and the lower mold 502 by the driving device 4 to apply a preset pressure to the composite sheet in the cavity, so as to shape the composite sheet into a battery sealing cover.

[0079] In some embodiments, continue to refer to Figure 1 The multifunction machine 1 includes a heating structure 101 , a cooling structure 102 and a conveying structure 103 . The cooling structure 102 and the heating structure 101 are sequentially distributed along the conveying direction of the conveying structure 103 .

[0080] During the process of the conveying structure 103 conveying the continuous reinforcing fibers, the heating structure 101 is used to supply heat to the prepreg material and the continuous reinforcing fibers so that the prepreg material fully impregnates the surface of the continuous reinforcing fibers, and the cooling structure 102 is used to solidify the impregnated material on the surface of the continuous reinforcing fibers to form a laminate 6 and a reinforcement plate.

[0081] In this embodiment, a heating structure 101 and a cooling structure 102 are sequentially arranged on the conveying path of the compound machine 1. The heating structure 101 and the cooling structure 102 cooperate with each other to effectively improve the production efficiency of the laminate 6 and the reinforcing plate.

[0082] In some embodiments, reference Figure 3 The heating device 3 includes an infrared heating device 301. The equipment for making a battery sealing cover also includes a slide rail 8. The mold 5 and the infrared heating device 301 are arranged on the slide rail 8. The infrared heating device 301 is used to slide along the slide rail 8 to a specified position to heat the mold 5 and the composite plate.

[0083] In this embodiment, when it is necessary to supply heat to the mold 5 and the composite sheet material in the mold 5, the infrared heating device 301 can be controlled to slide along the slide rail 8 toward the mold 5, and can hover directly above the mold 5. At this time, the infrared heating device 301 can be started, and heat energy can be provided to the laminate 6 and the reinforcing edge 7 through the infrared heating device 301. After the composite sheet material formed by the laminate 6 and the reinforcing edge 7 is softened and shaped, the infrared heating device 301 can be turned off, and the infrared heating device 301 can be controlled to slide away from the mold 5, and then the mold is opened to take out the shaped battery sealing cover.

[0084] Exemplarily, the moving speed of the infrared heating device 301 is 0-30 m / min, and the moving speed of the infrared heating device 301 is adjustable.

[0085] In this embodiment, the infrared heating device 301 is configured to slide along the slide rail 8, so that the infrared heating device 301 can be used and stopped immediately, that is, the infrared heating device 301 can be guaranteed to provide timely heat to the composite material in the mold 5. At the same time, after the heating is completed, the infrared heating device 301 can be moved to a position away from the mold 5 to avoid obstruction to the subsequent mold opening process. In addition, the infrared heating device 301 can directly transfer heat to the surface of the laminate 6 and the reinforcing edge 7 by electromagnetic radiation. During the heat conduction process, the heat loss is small, so the laminate 6 and the reinforcing edge 7 can be quickly heated and softened, thereby improving the production efficiency of the battery sealing cover.

[0086] In some embodiments, reference Figure 3 Combined with Figure 4 The mold 5 includes a heating system 9 and a cooling system 10. The heating system 9 is used to heat the mold 5 and the composite plate, and the cooling system 10 is used to cool the mold 5 and the composite plate.

[0087] For example, reference Figure 4 The heating system 9 may include a heating oil pipe 901 , and the cooling system 10 may include a cooling water pipe 1001 .

[0088] In this embodiment, the composite sheet in the mold 5 can be heated by the heating system 9 without the need for other external heating equipment, which can effectively save heating costs, and the composite sheet is cooled to 60°C-80°C by the cooling system 10. In this temperature range, the battery sealing cover formed by the composite sheet mold is basically finalized, so the mold can be opened, and waiting until the composite sheet is cooled to this temperature range before opening the mold can avoid the problem of deformation of the battery sealing cover caused by premature mold opening, thereby ensuring the yield of the battery sealing cover.

[0089] In some embodiments, continue to refer to Figure 4 The mold 5 also includes a protective shell 11, and the heating system 9 and the cooling system 10 are arranged in the protective shell 11.

[0090] In this embodiment, the protective shell 11 can provide good protection for the mold 5 as a whole, and the heating system 9 and cooling system 10 installed inside it are also convenient for maintenance and replacement, thereby reducing operation and maintenance costs.

[0091] Another exemplary embodiment of the present disclosure provides a battery sealing cover, referring to Figure 6 The battery sealing cover includes an integrally formed reinforcing edge 7 and a laminate 6. The reinforcing edge 7 is arranged around the edge of the laminate 6. The thickness of the reinforcing edge 7 is greater than the thickness of the laminate 6. The laminate 6 and the reinforcing plate are made of the same material, including continuous reinforcing fibers and an impregnating material covering the continuous reinforcing fibers.

[0092] In this embodiment, the continuous reinforcing fibers have a lower density and a higher strength, so the battery sealing cover can be lightweight and have a high strength. In addition, the reinforcing edge 7 and the laminate 6 of the battery sealing cover formed by the composite material mold are integrally formed. During long-term use, the reinforcing edge 7 and the laminate 6 will not separate, thereby ensuring the overall firmness of the battery sealing cover.

[0093] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0094] In the description of this specification, reference to the terms "embodiment", "exemplary embodiment", "some embodiments", "illustrative embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure.

[0095] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0096] In the description of the present disclosure, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A method for manufacturing a battery sealing cover, characterized in that: The production method comprises: Infiltrating continuous reinforcing fibers with molten prepreg materials to obtain laminates and reinforced plates; Cutting the reinforcement plate to obtain a reinforcement edge; The reinforcing edge and the laminate are sequentially fed into a mold, and the reinforcing edge and the laminate are heated to soften the reinforcing edge and the laminate and integrally form the composite plate; After the reinforcing edge and the laminate have softened for a preset period of time, closing the mold and applying a preset pressure to the composite sheet; Opening the mold to obtain the battery sealing cover; Wherein, the reinforcing edge is arranged around the edge of the laminate, and the thickness of the reinforcing edge is greater than the thickness of the laminate.

2. The method for manufacturing a battery sealing cover according to claim 1, characterized in that: The prepreg material comprises the following components by mass percentage: Resin 50%-60%; Flame retardant 20%-30%; Toughener 15%-25%.

3. The method for manufacturing a battery sealing cover according to claim 1, characterized in that: The preset time length is 10s-20s, and the preset pressure is 700t-800t.

4. The method for manufacturing a battery sealing cover according to claim 1, characterized in that: The mold includes a heating system, and the heating of the reinforcing edge and the laminate includes: The mold and the composite plate are heated to 80°C-100°C by using an infrared heating device; or, The mold and the composite plate are heated by the heating system with a heating temperature of 170°C-190°C.

5. The method for manufacturing a battery sealing cover according to claim 4, characterized in that: When the mold and the composite plate are heated by an infrared heating device, the duration of applying the preset pressure to the composite plate is 60s-90s; When the heating system is used to heat the mold and the composite plate, the duration of applying the preset pressure to the composite plate is 20 minutes to 30 minutes.

6. The method for manufacturing a battery sealing cover according to claim 4, characterized in that: The mold further includes a cooling system. After the mold and the composite plate are heated by the heating system, when pressure is applied to the composite plate, the manufacturing method of the battery sealing cover further includes: The mold and the composite plate are cooled to 60°C-80°C by using a cooling system.

7. A device for making a battery sealing cover, characterized in that: include: A compounding machine, used to impregnate the continuous reinforcing fibers with the prepreg material in a molten state to obtain a laminate and a reinforced plate; A cutting device, used for cutting the reinforcing plate to obtain a reinforcing edge; The mold comprises an upper mold and a lower mold, and the mold and the lower mold are molded together to form a cavity for placing the laminate and the reinforcing edge; A heating device, used for heating the reinforcing edge and the laminate in the mold, so that the reinforcing edge and the laminate are softened and integrally formed into a composite plate; A driving device is used to realize the closing and opening of the upper mold and the lower mold.

8. The device for making a battery sealing cover according to claim 7, characterized in that: The compound machine comprises a heating structure, a cooling structure and a conveying structure, wherein the cooling structure and the heating structure are sequentially distributed along a conveying direction of the conveying structure.

9. The device for making a battery sealing cover according to claim 7, characterized in that: The heating device includes an infrared heating device, and the equipment also includes a slide rail; the mold and the infrared heating device are arranged on the slide rail, and the infrared heating device is used to slide along the slide rail to a specified position to heat the mold and the composite plate; or, The mold comprises a heating system and a cooling system, wherein the heating system is used to heat the mold and the composite plate, and the cooling system is used to cool the mold and the composite plate.

10. A battery sealing cover, characterized in that: The battery sealing cover comprises an integrally formed reinforcing edge and a laminate, wherein the reinforcing edge is arranged around an edge of the laminate, and the thickness of the reinforcing edge is greater than the thickness of the laminate; The laminate and the reinforced plate are made of the same material, including continuous reinforcing fibers and a saturated material covering the continuous reinforcing fibers.

Images